body{
    background-color: rgba(252, 250, 237, 0.68);
    margin: 0;
}
#div_2{
    display: inline-block;
    width: 18rem;
    height: 5rem;
    font-size: 2rem;
    font-family: '楷体', sans-serif;
    background-color: blueviolet;
}
#div_2 span{
    color: deeppink;
    text-decoration: line-through;
}
#div_3{
    width: 100%;
    min-width: 70rem;
    height: 15rem;
    background-color: rgba(250, 235, 215, 0.62);
    text-align: center;
    font-family: '幼圆',sans-serif;
    font-style: oblique;
    clear: left;    /*清除左浮动*/
}
#div_3 p{
    margin: auto;
    width: 80%;
    font-size: 1rem;
    text-align: left;
    text-indent: 2rem;
    display: inline-block;
}